The turbo is capable of 25psi stock on a 6.7L diesel at 3500rpm. That works out to 65lb/min of airflow.

At 12psi you only need 46lb/[email protected] At sea level you should be able to hit 12psi at 1500rpm without surge. Above 4000ft you will have to limit max boost until after 2200rpm. IF you use a good intercooler.Not2Fast: Turbo Calculator